Reese Towpower 5000 lb. cap. 3 in. Ball Mount Lock - Ace Hardware
REESE, III, 1 in Compatible Ball Shank Dia, Adjustable Ball Mount - 20PM74|21141 - Grainger
Aluma-Tow Adjustable Ball Mount Hitch for 2.5 in. Receivers, 8 in. Drop at Tractor Supply Co.
Reese Towpower 7089444 Tactical Adjustable Ball Mount With Clevis, 2 Inch 2-5/16 in Dia Hitch Ball, Steel: Trailer Balls & Mounts + (042899012047-2)
Amazon.com: OPENROAD Adjustable Trailer Hitch Ball Mount Fits 2-Inch Receiver, 2" Tow Balls 7500lbs, 9-1/2" Drop/ 8-1/4" Rise Drop Hitch, Tow Hitch for Heavy Duty Truck with Stainless Steel Pins and Lock :
Amazon.com: Reese Towpower 21141 Adjustable Ball Mount , Black : Automotive